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Gomes NB, Almeida JVFPD, Neves JG, Correr AB, Correr-Sobrinho L, Costa AR. Evaluation of mechanical properties and morphology of miniscrews Ti6Al4V cold worked versus annealed in artificial bones. Int Orthod 2024; 22:100835. [PMID: 38141559 DOI: 10.1016/j.ortho.2023.100835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 11/24/2023] [Accepted: 11/27/2023] [Indexed: 12/25/2023]
Abstract
PURPOSE This study aimed to evaluate the influence of different manufacturing procedures (Eli annealed - hot work versus cold worked - cold work) of the raw material under mechanical properties and morphological characteristics of orthodontic miniscrews (MS). MATERIAL AND METHODS Thirty MS were randomly separated into 3 types (n=10) according to manufacturer and manufacturing process of the raw material: type A - SIN® annealed (control group); type B - Dentfix® annealed; and, type C - Dentfix® cold worked. MI were inserted in artificial bone blocks, through the manufacturer's specific manual key attached to the digital torquemeter stabilized via custom device. Data of fracture's occurrence was performed using Fisher's exact test. Comparisons between the other two types regarding insertion torque and removal torque were performed using the Mann-Whitney test. Data of fracture torque, shear stress, normal stress and torque ratio was submitted to Kruskal Wallis and Dunn tests (α=0.05). Representative images of surface morphology and fractures were selected. RESULTS Type C showed statistically the lowest fracture torque (N.cm) (26.11±0.41) (P=0.0012) and highest torque ratio (%) (98.74±0.85) (P=0.0007). Type C showed statistically higher calculated shear (MPa) (2,432.73±508.41) and normal stress (MPa) (1,403.86±293.39) than type B and type A, showing that they differed in relation to the mechanical strength of the material with which they were made (P=0.0007). CONCLUSION Type A fractured completely inside the most apical bone. Type B and type C fractured closer to the transmucosal profile. Cold worked process should be more prone to fractures than those annealed raw manufactured.
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Affiliation(s)
- Neylla Berg Gomes
- Department of Orthodontics, Hermínio Ometto Foundation - FHO, Araras, SP, Brazil
| | | | - José Guilherme Neves
- Department of Restorative Dentistry, Dental Materials area, Piracicaba Dental School, State University of Campinas, FOP - UNICAMP, Piracicaba, SP, Brazil
| | - Américo Bortolazzo Correr
- Department of Restorative Dentistry, Dental Materials area, Piracicaba Dental School, State University of Campinas, FOP - UNICAMP, Piracicaba, SP, Brazil
| | - Lourenço Correr-Sobrinho
- Department of Restorative Dentistry, Dental Materials area, Piracicaba Dental School, State University of Campinas, FOP - UNICAMP, Piracicaba, SP, Brazil
| | - Ana Rosa Costa
- Department of Orthodontics, Hermínio Ometto Foundation - FHO, Araras, SP, Brazil; Department of Restorative Dentistry, Dental Materials area, Piracicaba Dental School, State University of Campinas, FOP - UNICAMP, Piracicaba, SP, Brazil.
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Arango-Piloneta EV, Plaza-Ruiz SP, León-Lara DF, Munera M, Bedoya-Henao B, Martínez-Gallego T. Stress distribution for mandibular extra-alveolar anchorage at different angles and force magnitudes: a finite element study. Comput Methods Biomech Biomed Engin 2023:1-9. [PMID: 37647253 DOI: 10.1080/10255842.2023.2252549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/16/2023] [Accepted: 08/17/2023] [Indexed: 09/01/2023]
Abstract
The aim of this study was to evaluate the stress distribution in cortical and cancellous bones and within the screw when a stainless steel extra-alveolar screw (EA-S) is inserted into the retromolar region of the mandible using the finite element method (FEM). The stress values in the EA-S were highest at 60° with horizontal (shear) force and lowest at 90° with axial force. In the bones (cortical and cancellous), the stress value was greatest at 90° with horizontal force. Greater stability of the screw may be achieved by tilting it to the force when horizontal loads are applied.
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Affiliation(s)
- E V Arango-Piloneta
- Orthodontic Department, Fundación Universitaria CIEO-UniCIEO, Bogotá, Colombia
| | - S P Plaza-Ruiz
- Orthodontic Department, Fundación Universitaria CIEO-UniCIEO, Bogotá, Colombia
| | - D F León-Lara
- Engineering Department, Escuela Militar Nueva Granada, Bogotá, Colombia
| | - M Munera
- UWE Bristol - Frenchay Campus, University of West England, Bristol, UK
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Cui MX, Qi Y, Xue LF, Xu YX, Yue J, Zhao JZ, Li C, Xiao WL. Comparative study of stress characteristics around the adjacent teeth tissues during insertion of mini-screws with different insertion angles: A three-dimensional finite element study. J Mech Behav Biomed Mater 2023; 142:105879. [PMID: 37141745 DOI: 10.1016/j.jmbbm.2023.105879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/27/2023] [Accepted: 04/29/2023] [Indexed: 05/06/2023]
Abstract
With a limited alveolar bone position, there is a high risk that mini-screws (MS) implants could cause damage to the adjacent teeth. To reduce this damage, the position and tilt angle of the MS must be optimized. The aim of this study was to assess the effect of MS implantation angle on the stress exerted on adjacent periodontal membrane and roots. A three-dimensional finite element model containing dentition, periodontal ligament, jaw and MS were established based on the CBCT images and MS scanning data. The MS was first inserted perpendicular to the surface of the bone at specific locations and then tilted at an angle of 10° and 20° to the mesial and distal teeth, respectively. The stress distribution in the periodontal tissue of the adjacent teeth was analyzed after MS implantation at different angles.The stress on the adjacent tooth root and periodontal ligament was most uniformly distributed when the MS was inserted vertically. It changed 9.4-97.7% when the axis of MS was tilted at 10-degree and 20-degree angles from the point of vertical insertion. The stresses experienced by the periodontal ligament and the root are similar. When the horizontal angle of the MS insertion was changed, the MS was closer to the adjacent tooth, resulting in greater stress near the PDL and root. It was recommended to insert the MS vertically into the alveolar bone surface to avoid root damage due to excessive stress.
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Affiliation(s)
- Ming-Xue Cui
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China; School of Stomatology, Qingdao University, Qingdao, Shandong, 266071, China
| | - Yan Qi
- Department of Stomatology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, Shandong, 250014, China
| | - Ling-Fa Xue
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Yao-Xiang Xu
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Jin Yue
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Jin-Ze Zhao
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China; School of Stomatology, Qingdao University, Qingdao, Shandong, 266071, China
| | - Cong Li
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China; School of Stomatology, Qingdao University, Qingdao, Shandong, 266071, China
| | - Wen-Lin Xiao
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China; School of Stomatology, Qingdao University, Qingdao, Shandong, 266071, China.
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Analysis for Predictors of Failure of Orthodontic Mini-implant Using Patient-Specific Finite Element Models. Ann Biomed Eng 2023; 51:594-603. [PMID: 36167866 DOI: 10.1007/s10439-022-03067-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 08/27/2022] [Indexed: 11/01/2022]
Abstract
In this study, we analyzed the clinical factors and mechanical parameters for predicting orthodontic mini-implant (OMI) failure in the mandible, which has different properties from the maxilla. A patient-specific finite element analysis was applied to 32 OMIs (6 failures and 26 successes) implanted between the mandibular second premolars and first molars used for anchorage. The peak stress and strain parameters were calculated for each sample. A logistic regression of the failure (vs. success) of OMIs on the mechanical parameters in the models was conducted. In addition, the influence of clinical factors on the mechanical parameters considered to be related to OMI failure was examined by a regression analysis. The mechanical parameter which best predicts OMI failure in the mandible was found to be a minimum principal strain of between 0.5 to 1.0 mm from the OMI surface (R2 = 0.8033). The results indicate the patient's bone density, distance between the OMIs and adjacent root, and vertical implantation angle of the OMIs are potential clinical predictors of OMI failure in the mandible.
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Razaghi P, Moradi Haghgou J, Khazaei S, Farhadian N, Fekrazad R, Gholami L. The Effect of Photobiomodulation Therapy on the Stability of Orthodontic Mini-implants in Human and Animal Studies: A Systematic Review and Meta-analysis. J Lasers Med Sci 2023; 13:e27. [PMID: 36743132 PMCID: PMC9841378 DOI: 10.34172/jlms.2022.27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 04/05/2022] [Indexed: 11/22/2022]
Abstract
Introduction: The present study aimed to systematically explore available literature on the possible impact of photobiomodulation (PBM) therapy on the stability and success of orthodontic mini-implants. Methods: A comprehensive electronic search was conducted in PubMed, ISI Web of Science, Scopus, Cochrane and Embase databases for human and animal studies published until July 2021. Two independent researchers reviewed the studies based on specific eligibility criteria. Results: 15 studies were included in the systematic review after a comprehensive search. Ten studies were included in the meta-analysis. Four were human RCT studies that evaluated the stability with Preriotest. Three other human RCT studies and two animal studies had evaluated the Implant stability quotient (ISQ). Two human RCTs that had evaluated displacement of mini-implants were also analyzed. The analysis of Periotest stability results showed a positive effect of PBM on mini-implant stability at 30 and 60 days after implantation (P<0.05). In human studies using the ISQ method, a slight improvement was seen in the PBM groups; however, this was not statistically significant (CI=-1.92-2.70, SMD=0.39). In studies that examined the displacement of mini-implants, no statistically significant difference was observed between irradiated and non-irradiated groups (CI=-1.92-2.70, SMD=0.03). According to the results of animal studies, which had used the ISQ method, the use of laser was statistically effective in increasing the stability of mini-implants (SMD=1.43, CI=1.00-1.85). Conclusion: PBM therapy can be suggested as an adjunctive clinical method to improve the stability of mini-implant treatment. Further well-designed clinical studies can help establish evidence-based dosing and irradiation protocols.
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Affiliation(s)
- Parnian Razaghi
- Dental Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Janet Moradi Haghgou
- Department of Periodontology, School of Dentistry, Hamadan Dental Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Salman Khazaei
- Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Nasrin Farhadian
- Department of Orthodontics, School of Dentistry, Hamadan Dental Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Reza Fekrazad
- Radiation Sciences Research Center, Laser Research Center in Medical Sciences, AJA University of Medical Sciences, Tehran, Iran.,International Network for Photo Medicine and Photo Dynamic Therapy (INPMPDT), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Leila Gholami
- Department of Periodontology, School of Dentistry, Dental Implants Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
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Bungău TC, Vaida LL, Moca AE, Ciavoi G, Iurcov R, Romanul IM, Buhaș CL. Mini-Implant Rejection Rate in Teenage Patients Depending on Insertion Site: A Retrospective Study. J Clin Med 2022; 11:jcm11185331. [PMID: 36142978 PMCID: PMC9502099 DOI: 10.3390/jcm11185331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/04/2022] [Accepted: 09/08/2022] [Indexed: 11/16/2022] Open
Abstract
Mini-implants have undeniable advantages in Orthodontics. However, the use of mini-implants shows some limitations and disadvantages related to patient age, the quality of the bone tissue, the characteristics of the oral mucosa, implant site, the state of health of the organism and the quality of oral hygiene. The aim of this paper was to analyze the rejection rate of mini-implants in teenage patients, depending on their insertion site, and examine their stability up to three months after insertion. This retrospective study was conducted on dental charts belonging to patients aged between 12 and 17 years, from Oradea, Romania. The mini-implants were placed for various therapeutic reasons and were inserted in the following sites: buccal maxillary area, the infrazygomatic region, palatal area, buccal mandibular area and lingual area; they had a diameter of 1.6 mm (inter-radicular spaces) and of 2 mm (nonbearing tooth areas), and a length of 6–8 mm (mandible) or 8–10 mm (maxilla). The rejection rate was checked in the first month, second month, third month and after the third month from insertion. A total of 432 patients were included in the study, and they had a total of 573 mini-implants. Most implants were placed in the buccal region of the maxilla (27.7%), and most patients had one mini-implant placed (65.7%). The highest rejection rate was obtained in the first month (15.2%). The rejection rate between genders was similar. The mini-implants from the buccal mandibular region had a significantly higher rate of rejection in the first month (M1) in comparison to the mini-implants from the palatal region (24.4% vs. 8.3%). The mini-implants from the lingual region of the mandible had a significantly higher rate of rejection in the second month (M2) in comparison to the mini-implants from the infrazygomatic or the palatal region (10.5% vs. 0%/0%). Mini-implants are very useful for carrying out various orthodontic treatments, but their stability should be enhanced.
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Affiliation(s)
- Teodora Consuela Bungău
- Department of Dentistry, Faculty of Medicine and Pharmacy, University of Oradea, 10 Piața 1 Decembrie Street, 410073 Oradea, Romania
| | - Luminița Ligia Vaida
- Department of Dentistry, Faculty of Medicine and Pharmacy, University of Oradea, 10 Piața 1 Decembrie Street, 410073 Oradea, Romania
- Correspondence: (L.L.V.); (A.E.M.)
| | - Abel Emanuel Moca
- Department of Dentistry, Faculty of Medicine and Pharmacy, University of Oradea, 10 Piața 1 Decembrie Street, 410073 Oradea, Romania
- Correspondence: (L.L.V.); (A.E.M.)
| | - Gabriela Ciavoi
- Department of Dentistry, Faculty of Medicine and Pharmacy, University of Oradea, 10 Piața 1 Decembrie Street, 410073 Oradea, Romania
| | - Raluca Iurcov
- Department of Dentistry, Faculty of Medicine and Pharmacy, University of Oradea, 10 Piața 1 Decembrie Street, 410073 Oradea, Romania
| | - Ioana Mihaela Romanul
- Department of Dentistry, Faculty of Medicine and Pharmacy, University of Oradea, 10 Piața 1 Decembrie Street, 410073 Oradea, Romania
| | - Camelia Liana Buhaș
- Department of Morphological Disciplines, Faculty of Medicine and Pharmacy, University of Oradea, 410087 Oradea, Romania
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Jedliński M, Janiszewska-Olszowska J, Mazur M, Grocholewicz K, Suárez Suquía P, Suárez Quintanilla D. How Does Orthodontic Mini-Implant Thread Minidesign Influence the Stability?—Systematic Review with Meta-Analysis. J Clin Med 2022; 11:jcm11185304. [PMID: 36142951 PMCID: PMC9506209 DOI: 10.3390/jcm11185304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/31/2022] [Accepted: 09/03/2022] [Indexed: 12/09/2022] Open
Abstract
Background: Clinical guidelines are lacking for the use of orthodontic mini-implants (OMIs) in terms of scientific evidence referring to the choice of proper mini-design. Thus, the present study aimed to investigate to what extent orthodontic mini-implant thread design influences its stability. Methods: Search was conducted in five search engines on 10 May. Quality assessment was performed using study type specific scales. Whenever possible, meta-analysis was performed. Results: The search strategy identified 118 potential articles. Twenty papers were subjected to qualitative analysis and data from 8 papers—to meta-analysis. Studies included were characterized by high or medium quality. Four studies were considered as low quality. No clinical studies considering the number of threads, threads depth, or TSF have been found in the literature. Conclusions: Minidesign of OMIs seems to influence their stability in the bone. Thread pitch seems to be of special importance for OMIs retention—the more dense thread—the better stability. Thread depth seems to be of low importance for OMIs stability. There is no clear scientific evidence for optimal thread shape factor. Studies present in the literature vary greatly in study design and results reporting. Research received no external funding. Study protocol number in PROSPERO database: CRD42022340970.
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Affiliation(s)
- Maciej Jedliński
- Department of Interdisciplinary Dentistry, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland
- Department of Dental and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
- Correspondence: ; Tel.: +48-91-466-1690
| | | | - Marta Mazur
- Department of Dental and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
| | - Katarzyna Grocholewicz
- Department of Interdisciplinary Dentistry, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland
| | - Pedro Suárez Suquía
- Department of Surgery and Medical-Surgical Specialities, Faculty of Medicine and Dentistry, University of Santiago de Compostela, 15705 Santiago de Compostela, Spain
| | - David Suárez Quintanilla
- Department of Surgery and Medical-Surgical Specialities, Faculty of Medicine and Dentistry, University of Santiago de Compostela, 15705 Santiago de Compostela, Spain
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Wang Y, Sun J, Shi Y, Li X, Wang Z. Buccal bone thickness of posterior mandible for microscrews implantation in molar distalization. Ann Anat 2022; 244:151993. [PMID: 36041697 DOI: 10.1016/j.aanat.2022.151993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 06/04/2022] [Accepted: 08/16/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND This study explored the inter-radicular space and buccal bone thickness of the posterior mandibular region to provide an appropriate miniscrew insertion site for lower dentition distalization. METHODS The cone-beam computed tomographic (CBCT) records of 63 subjects were collected. Buccal bone thickness (BBT) was measured at four sections: (I) the root of the second premolar(P1); (II) the mesial root of the first molar(P2); (III) the distal root of the first molar(P3); (IV) the mesial root of the second molar(P4). The narrowest inter-radicular space of the four sections was also detected. Both BBT and inter-radicular space were measured at 4 height levels, 2, 4, 6 and 8mm from the alveolar ridge. RESULTS The largest BBT was observed at the mesial root of the second molar at 6 and 8mm, demonstrating a thickness of 6.77±2.50mm and 7.46±1.94mm, respectively. It provided sufficient coverage for mini-implants inserted 10°-30° oblique to the root. Therefore, during distalization of the mandibular dentition, roots have sufficient space to bypass the inclined mini-implants on the lingual side, avoiding miniscrew-root contact. The width between the mesiodistal roots of the first molar was the smallest, showing 1.53±0.69mm and 2.13±0.65mm at 4 and 6mm. Miniscrews implanted in this region had an increased risk of root proximity. CONCLUSIONS The most appropriate insertion site at the mandibular buccal shelf was the mesial point of the second molar at 6-8mm from the alveolar ridge, and an insertion angle of 10°-30° was recommended to avoid miniscrew-root contact. CBCT analysis is recommended before implantation due to individual differences.
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Affiliation(s)
- Yaqi Wang
- Department of Orthodontics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 324 Jingwu Road, Jinan, Shandong, China.
| | - Jing Sun
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 324 Jingwu Road, Jinan, Shandong, China.
| | - Yanli Shi
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 324 Jingwu Road, Jinan, Shandong, China.
| | - Xin Li
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 324 Jingwu Road, Jinan, Shandong, China.
| | - Zhiqiang Wang
- Department of Orthodontics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 324 Jingwu Road, Jinan, Shandong, China; Department of Orthodontics,Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 324 Jingwu Road, Jinan, Shandong, China.
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The Efficacy of Orthodontics plus Implant Anchorage in Orthodontic Treatment: A Randomized Controlled Study. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:4049076. [PMID: 35677371 PMCID: PMC9170419 DOI: 10.1155/2022/4049076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/28/2022] [Accepted: 05/09/2022] [Indexed: 11/25/2022]
Abstract
Objective To investigate the efficacy of orthodontics plus implant anchorage in orthodontic treatment. Methods This randomized controlled study was conducted on 90 patients who had orthodontic treatment in our hospital between October 2019 and October 2020, and they were assigned to either a control group (n = 45) or an observation group (n = 45) via the random number table method. Patients in the control group received orthodontics while those in the observation group underwent orthodontics plus implant anchorage. The two groups were compared in terms of clinical indexes, efficacy, orthodontic state, adverse reaction rate, quality of life, and satisfaction. Results After treatment, orthodontics plus implant anchorage led to lower gingival attachment level, gingival bleeding index, plaque index, and periodontal probing depth versus orthodontics alone (P < 0.05); orthodontics plus implant anchorage contributed to a higher efficacy versus orthodontics alone (91.11% vs. 73.33%, P < 0.05); orthodontics plus implant anchorage resulted in smaller molar displacement, larger protrusion distance of the upper central incisor, and larger inclination angle of the upper central incisor (P < 0.05); orthodontics plus implant anchorage was associated with fewer adverse reactions (4.44% vs. 26.67%, P < 0.05) and a higher quality of life scores versus orthodontics alone (P < 0.05); orthodontics plus implant anchorage yielded a higher satisfaction level versus orthodontics alone (95.56% vs. 66.67%, P < 0.05). Conclusion The orthodontics plus implant anchorage offers a promising solution in orthodontic treatment. It is conducive to restoring dental indicators and improving quality of life and satisfaction. It is therefore worthy of application.
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[Efficacy of vertical control by using mini-implant anchorage in maxillary posterior buccal area for Angle class Ⅱ extraction patients]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2022; 54. [PMID: 35435202 PMCID: PMC9069030 DOI: 10.19723/j.issn.1671-167x.2022.02.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To investigate the efficacy of vertical control by using conventional mini-implant anchorage in maxillary posterior buccal area for Angle class Ⅱ extraction patients. METHODS Twenty-eight Angle class Ⅱ patients [9 males, 19 females, and age (22.6±2.8) years] were selected in this study. All of these patients were treated by using straight wire appliance with 4 premolars extraction and 2 mini-implant anchorage in maxillary posterior buccal area. In this study, the self-control method was used to measure and analyze the lateral radiographs taken before and after orthodontic treatment in each case, the main cephalometric analysis items were related to vertical changes. The digitized lateral radiographs were imported into Dolphin Imaging Software (version 11.5: Dolphin Imaging and Management Solutions, Chatsworth, California, USA), and marked points were traced. Each marked point was confirmed by two orthodontists. The same orthodontist performed measurement on the lateral radiographs over a period of time. All measurement items were required to be measured 3 times, and the average value was taken as the final measurement result. RESULTS Analysis of the cephalometric radiographs showed that, for vertical measurements after treatment, the differences of the following measurements were highly statistically significant (P < 0.001): SN-MP decreased by (1.40±1.45) degrees on average, FMA decreased by (1.58±1.32) degrees on average, the back-to-front height ratio (S-Go/N-Me) decreased by 1.42%±1.43% on average, Y-axis angle decreased by (1.03±0.99) degrees on average, face angle increases by (1.37±1.05) degree on average; The following measurements were statistically significant (P < 0.05): the average depression of the upper molars was (0.68±1.40) mm, and the average depression of the upper anterior teeth was (1.07±1.55) mm. The outcomes indicated that there was a certain degree of upper molar depression after the treatment, which produced a certain degree of counterclockwise rotation of the mandibular plane, resulting in a positive effect on the improvement of the profile. CONCLUSION The conventional micro-implant anchorage in maxillary posterior buccal area has a certain vertical control ability, and can give rise to a certain counterclockwise rotation of the mandible, which would improve the profile of Angle Class Ⅱ patients.
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Cone-beam computed tomography and digital model analysis of maxillary buccal alveolar bone thickness for vertical temporary skeletal anchorage device placement. Am J Orthod Dentofacial Orthop 2022; 161:e429-e438. [DOI: 10.1016/j.ajodo.2021.12.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/01/2021] [Accepted: 12/01/2021] [Indexed: 11/19/2022]
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Golshah A, Gorji K, Nikkerdar N. Effect of miniscrew insertion angle in the maxillary buccal plate on its clinical survival: a randomized clinical trial. Prog Orthod 2021; 22:22. [PMID: 34337677 PMCID: PMC8326233 DOI: 10.1186/s40510-021-00370-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/18/2021] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION This study sought to assess the effect of miniscrew insertion angle (vertical and oblique) on its clinical survival under shearing forces in orthodontic patients undergoing canine retraction. MATERIALS AND METHODS In this split-mouth randomized controlled clinical trial, 50 miniscrews were placed bilaterally in 25 patients with 45° and 90° insertion angles relative to a line perpendicular to the occlusal plane distal to the maxillary first premolar extraction site. Allocation of insertion angles to the right/left side was random using the Random Allocation Software. The patients, clinician, and statistician were blinded to the allocation of miniscrews to the side of jaw. The patients were followed-up monthly for 6 months. The primary outcome was the clinical survival of miniscrews, which was evaluated at each follow-up session. The secondary outcomes were the miniscrew stability based on the Periotest value (PTV) and the level of pain experienced by patients at 1, 12, and 24 h, and 7 days after miniscrew placement using a visual analog scale (VAS). Data were analyzed using paired t-test, repeated measures ANOVA, and McNemar's test. RESULTS The clinical survival rate of miniscrews placed at 90° and 45° angles was 76% and 88%, respectively. This difference was not statistically significant (P = 0.375). No significant difference was noted between the two groups regarding the PTV or the pain score either (P > 0.05). CONCLUSION Clinically, the insertion angle of miniscrews (90° versus 45° relative to a line perpendicular to the occlusal plane) has no significant effect on the miniscrew survival rate or stability during orthodontic treatment. TRIAL REGISTRATION This trial was registered at www.irct.ir ( IRCT20190901044659N1 ). PROTOCOL The protocol was published after trial commencement.
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Affiliation(s)
- Amin Golshah
- Department of Orthodontic, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Kimia Gorji
- Students Research Committee, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nafiseh Nikkerdar
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Popova NV, Arsenina OI, Lebedenko IY, Rusanov FS, Khvorostenko EA, Glukhova NV. [The experimental study of a Russian orthodontic mini-screw]. STOMATOLOGIIA 2021; 100:7-12. [PMID: 34180618 DOI: 10.17116/stomat20211000317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
BACKGROUND The aim of this research is the experimental study measuring stability of the orthodontic miniscrews «Turbo» designed in Russia in comparison with its foreign analogues, namely, «Vector Tas» (USA) and «BioRay» (Taiwan). MATERIAL AND METHODS Four self-drilling orthodontic miniscrews of each manufacturer, i.e. «Vector Tas», USA, (10-mm length, 2-mm diameter), «BioRay», Taiwan, (10-mm length, 2-mm diameter), «Turbo», Russia, (9-mm length, 2-mm diameter), a total of 12 items, were inserted into native pig mandible sample. Their stability was estimated by torques using a dynamometer (Zahoransky AG, Germany) and «Periotest» device («Periotest M», Germany). This experiment was conducted in native pig mandible sample immediately after the screws' placement and in 7 days after loading at an angle 70°. RESULTS After application of a load, the decreased torque values and increased Periotest values were registered in all orthodontic miniscrews. CONCLUSION Orthodontic miniscrews «Turbo» designed in Russia are slightly inferior to «VectorTas» miniscrews and superior to «BioRay» miniscrews in primary stability and stability after 7 days under loading.
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Affiliation(s)
- N V Popova
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
| | - O I Arsenina
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
- Peoples' Friendship University of Russia, Moscow, Russia
| | - I Yu Lebedenko
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
- Peoples' Friendship University of Russia, Moscow, Russia
| | - F S Rusanov
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
| | - E A Khvorostenko
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
| | - N V Glukhova
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
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